cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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subskeleton.c (1965B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright (c) Meta Platforms, Inc. and affiliates. */
      3
      4#include <test_progs.h>
      5#include "test_subskeleton.skel.h"
      6#include "test_subskeleton_lib.subskel.h"
      7
      8static void subskeleton_lib_setup(struct bpf_object *obj)
      9{
     10	struct test_subskeleton_lib *lib = test_subskeleton_lib__open(obj);
     11
     12	if (!ASSERT_OK_PTR(lib, "open subskeleton"))
     13		return;
     14
     15	*lib->rodata.var1 = 1;
     16	*lib->data.var2 = 2;
     17	lib->bss.var3->var3_1 = 3;
     18	lib->bss.var3->var3_2 = 4;
     19
     20	test_subskeleton_lib__destroy(lib);
     21}
     22
     23static int subskeleton_lib_subresult(struct bpf_object *obj)
     24{
     25	struct test_subskeleton_lib *lib = test_subskeleton_lib__open(obj);
     26	int result;
     27
     28	if (!ASSERT_OK_PTR(lib, "open subskeleton"))
     29		return -EINVAL;
     30
     31	result = *lib->bss.libout1;
     32	ASSERT_EQ(result, 1 + 2 + 3 + 4 + 5 + 6, "lib subresult");
     33
     34	ASSERT_OK_PTR(lib->progs.lib_perf_handler, "lib_perf_handler");
     35	ASSERT_STREQ(bpf_program__name(lib->progs.lib_perf_handler),
     36		     "lib_perf_handler", "program name");
     37
     38	ASSERT_OK_PTR(lib->maps.map1, "map1");
     39	ASSERT_STREQ(bpf_map__name(lib->maps.map1), "map1", "map name");
     40
     41	ASSERT_EQ(*lib->data.var5, 5, "__weak var5");
     42	ASSERT_EQ(*lib->data.var6, 6, "extern var6");
     43	ASSERT_TRUE(*lib->kconfig.CONFIG_BPF_SYSCALL, "CONFIG_BPF_SYSCALL");
     44
     45	test_subskeleton_lib__destroy(lib);
     46	return result;
     47}
     48
     49void test_subskeleton(void)
     50{
     51	int err, result;
     52	struct test_subskeleton *skel;
     53
     54	skel = test_subskeleton__open();
     55	if (!ASSERT_OK_PTR(skel, "skel_open"))
     56		return;
     57
     58	skel->rodata->rovar1 = 10;
     59	skel->rodata->var1 = 1;
     60	subskeleton_lib_setup(skel->obj);
     61
     62	err = test_subskeleton__load(skel);
     63	if (!ASSERT_OK(err, "skel_load"))
     64		goto cleanup;
     65
     66	err = test_subskeleton__attach(skel);
     67	if (!ASSERT_OK(err, "skel_attach"))
     68		goto cleanup;
     69
     70	/* trigger tracepoint */
     71	usleep(1);
     72
     73	result = subskeleton_lib_subresult(skel->obj) * 10;
     74	ASSERT_EQ(skel->bss->out1, result, "unexpected calculation");
     75
     76cleanup:
     77	test_subskeleton__destroy(skel);
     78}